Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-08-09
2010-02-16
Masih, Karen (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S139000, C318S063000
Reexamination Certificate
active
07663336
ABSTRACT:
In a control apparatus for a vehicle having an electric motor for driving the wheels of the vehicle, an electric power source for energizing the electric motor, a motor torque target value calculation unit for controlling the electric power source, and a field current target value calculation unit, the motor field current is momentarily decreased when the difference between the actual motor armature current and the motor armature current target value exceeds a predetermined value or when the wheels are deemed to slip, and the motor field current is increased as the actual armature current of the motor substantially follows the motor armature current target value.
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European Search Report dated Oct. 5, 2007 (nine (9) pages).
Imura Shinya
Ito Masaru
Itoh Kohei
Matsuzaki Norikazu
Moriki Hidekazu
Crowell & Moring LLP
Hitachi , Ltd.
Masih Karen
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